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Old 13th February 2008, 07:19 PM   #5
Join Date: Jan 1970
Location: Austria - Lake Neusiedler, closed Vienna
Posts: 137
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I have made underwater video of my own developed 70cm F1 H+ fin using the Apollo in flat water. It shows: Flex up to 20cm to one side. The angel of attack is between 1 and 4 degree, so you can imagine how tip twist can influence all! At the downwind you will find 1 to 2 degrees and upwind 3 to 4. (If anyone is interested I will place the fin video to youtube)
br peter
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